package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        String mdPwd = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!mdPwd.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     *  新增员工
     * @param employeeDTO   员工信息
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {

        // 有值之后在完成数据库的写入操作
        Employee employee = new Employee();
        // employeeDTO -> employee
        BeanUtils.copyProperties(employeeDTO,employee);
        // 默认密码
        String md5Pwd = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(md5Pwd);
        // 默认状态
        // 1 启用 2 禁用
        employee.setStatus(StatusConstant.ENABLE);
        // 调用mapper层写入数据库
        this.employeeMapper.insert(employee);
    }

    /**
     *  分页查询
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 调用pagehelper，开启分页
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        // 查询分页
        Page<Employee> page = this.employeeMapper.page(employeePageQueryDTO);
        // 构建最终返回结果
        PageResult pageResult = new PageResult();
        // 总记录数
        pageResult.setTotal(page.getTotal());
        // 数据
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     *  启用禁用
     */
    @Override
    public void statusOrStop(Integer status, Long id) {
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.update(employee);
    }

    /**
     *  根据id获取员工
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     *  修改员工
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.update(employee);
    }

    /**
     *  TODO  修改密码--有BUG
     */
//    @Override
//    public void updatePassword(PasswordEditDTO passwordEditDTO) {
//        passwordEditDTO.setEmpId(BaseContext.getCurrentId());
//
//        String password = employeeMapper.getPasswordById(passwordEditDTO.getEmpId());
//
//        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
//
//        if(!password.equals(oldPassword)){
//            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
//        }
//
//        if(passwordEditDTO.getOldPassword().equals(passwordEditDTO.getNewPassword())){
//            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
//        }
//
//        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
//        Employee employee = new Employee();
//        employee.setId(passwordEditDTO.getEmpId());
//        employee.setPassword(newPassword);
//        employeeMapper.update(employee);
//    }

}
